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Home Cinema 3900
User Manual
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Product Sheet
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Epson Home Cinema 3900 User Manual

PowerLite
®
Home Cinema 3900
User's Guide

Contents

PowerLite Home Cinema 3900 User's Guide............................................................................................. 9
Introduction to Your Projector ................................................................................................................. 10
Setting Up the Projector ........................................................................................................................... 22
Product Box Contents.................................................................................................................... 11
Additional Components ................................................................................................................ 12
Optional Equipment and Replacement Parts................................................................................. 13
Warranty and Registration Information .......................................................................................... 13
Where to Go for Additional Information .............................................................................................. 14
Projector Parts - Front/Top ............................................................................................................ 16
Projector Parts - Rear .................................................................................................................... 17
Projector Parts - Base.................................................................................................................... 18
Projector Parts - Control Panel ...................................................................................................... 19
Projector Parts - Remote Control................................................................................................... 20
Projector Placement........................................................................................................................... 22
Projector Setup and Installation Options ....................................................................................... 22
Projection Distance........................................................................................................................ 24
Projector Connections........................................................................................................................ 28
Connecting to an HDMI Video Source ........................................................................................... 28
Connecting to Computer Sources.................................................................................................. 29
Connecting to a Computer for VGA Video................................................................................. 29
Connecting to a Computer for HDMI Video............................................................................... 30
Connecting to External Speakers .................................................................................................. 31
Connecting to a Trigger Out Port ................................................................................................... 31
Using the Projector on a Network ............................................................................................................ 34
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Connecting to a Wired Network ..................................................................................................... 34
Selecting Wired Network Settings ................................................................................................. 35
Installing the Wireless LAN Module ............................................................................................... 38
Selecting Wireless Network Settings Manually.............................................................................. 39
Wireless LAN Menu Settings .................................................................................................... 41
Restricted IP Addresses ........................................................................................................... 42
Using a QR Code to Connect a Mobile Device .............................................................................. 43
Searching for a Wireless Network ................................................................................................. 45
Selecting Wireless Network Settings in Windows.......................................................................... 47
Selecting Wireless Network Settings in OS X................................................................................ 47
Enabling WPA or WPA2 Security .................................................................................................. 47
Wireless Security Menu Settings .............................................................................................. 48
Using Basic Projector Features ............................................................................................................... 51
Using the Home Screen................................................................................................................. 53
Pairing the 3D Glasses with the Projector...................................................................................... 57
Charging the 3D Glasses............................................................................................................... 58
3D Viewing Range......................................................................................................................... 59
Selecting the Language for the Projector Menus................................................................................ 59
Adjusting the Image Position Using Lens Shift ................................................................................... 61
Correcting Image Shape with the Keystone Buttons...................................................................... 63
Correcting Image Shape with Quick Corner .................................................................................. 64
Resizing the Image with the Zoom Ring ............................................................................................. 66
Focusing the Image Using the Focus Ring......................................................................................... 67
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Changing the Projection Mode Using the Menus........................................................................... 70
Image Aspect Ratio ............................................................................................................................ 71
Changing the Image Aspect Ratio ................................................................................................. 71
Available Image Aspect Ratios ...................................................................................................... 72
Changing the Color Mode.............................................................................................................. 72
Available Color Modes................................................................................................................... 73
Turning On Auto Iris....................................................................................................................... 74
Adjusting Projector Features ................................................................................................................... 75
Shutting Off the Picture and Sound Temporarily ................................................................................ 75
Using Picture in Picture ...................................................................................................................... 75
Available Picture in Picture Options............................................................................................... 76
Locking the Projector's Buttons ..................................................................................................... 82
Unlocking the Projector's Buttons ............................................................................................. 83
Installing a Security Cable ............................................................................................................. 83
Saving Settings to Memory and Using Saved Settings ...................................................................... 84
Adjusting the Menu Settings .................................................................................................................... 86
Projector Feature Settings - Settings Menu........................................................................................ 95
Projector Setup Settings - Extended Menu......................................................................................... 98
Projector Network Settings - Network Menu..................................................................................... 101
Projector Information Display - Info Menu ........................................................................................ 102
Event ID Code List....................................................................................................................... 104
Projector Reset Options - Reset Menu............................................................................................. 105
Maintaining and Transporting the Projector ......................................................................................... 107
Projector Maintenance ..................................................................................................................... 107
Cleaning the Lens........................................................................................................................ 107
Cleaning the Projector Case ........................................................................................................ 108
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Cleaning the 3D Glasses............................................................................................................. 108
Air Filter and Vent Maintenance .................................................................................................. 109
Cleaning the Air Filter.............................................................................................................. 109
Replacing the Air Filter ............................................................................................................ 112
Projector Lamp Maintenance....................................................................................................... 114
Replacing the Lamp ................................................................................................................ 115
Resetting the Lamp Timer....................................................................................................... 119
Replacing the Remote Control Batteries ..................................................................................... 120
Transporting the Projector................................................................................................................ 122
Solving Problems .................................................................................................................................... 124
Projection Problem Tips ................................................................................................................... 124
Projector Light Status ....................................................................................................................... 124
Solving Image or Sound Problems ................................................................................................... 127
Solutions When No Image Appears............................................................................................. 127
Solutions When "No Signal" Message Appears........................................................................... 128
Displaying From a PC Laptop ................................................................................................. 128
Displaying From a Mac Laptop ............................................................................................... 129
Solutions When "Not Supported" Message Appears ................................................................... 129
Solutions When Only a Partial Image Appears............................................................................ 130
Solutions When the Image is Not Rectangular ............................................................................ 130
Solutions When the Image Contains Noise or Static ................................................................... 131
Solutions When the Image is Fuzzy or Blurry .............................................................................. 131
Solutions When the Image Brightness or Colors are Incorrect .................................................... 132
Solutions When a 3D Image Does Not Display Correctly ............................................................ 133
Solutions to Panel Alignment Problems....................................................................................... 134
Solutions to Sound Problems ...................................................................................................... 134
Solving Projector or Remote Control Operation Problems ............................................................... 135
Solutions to Projector Power or Shut-Off Problems..................................................................... 135
Solutions to Problems with the Remote Control........................................................................... 136
Solutions to Password Problems ................................................................................................. 137
Solutions When Using HDMI Link................................................................................................ 137
Solutions When Wireless Authentication Fails ................................................................................. 137
Where to Get Help............................................................................................................................ 138
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Technical Specifications ........................................................................................................................ 140
General Projector Specifications ...................................................................................................... 140
Projector Lamp Specifications.......................................................................................................... 141
Remote Control Specifications ......................................................................................................... 142
Projector Dimension Specifications.................................................................................................. 142
Projector Electrical Specifications .................................................................................................... 142
Projector Environmental Specifications............................................................................................ 143
Projector Safety and Approvals Specifications................................................................................. 143
Supported Video Display Formats.................................................................................................... 144
Notices ..................................................................................................................................................... 146
Recycling.......................................................................................................................................... 146
Important Safety Information ............................................................................................................ 146
Important Safety Instructions............................................................................................................ 147
Restriction of Use ........................................................................................................................ 149
List of Safety Symbols (corresponding to IEC60950-1 A2)............................................................... 150
FCC Compliance Statement............................................................................................................. 153
Open Source Software License........................................................................................................ 154
Binding Arbitration and Class Waiver ............................................................................................... 203
Trademarks...................................................................................................................................... 206
Copyright Notice............................................................................................................................... 207
A Note Concerning Responsible Use of Copyrighted Materials................................................... 208
Copyright Attribution.................................................................................................................... 208
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PowerLite Home Cinema 3900 User's Guide
Welcome to the PowerLite Home Cinema 3900 User's Guide.
For a printable PDF copy of this guide, click here.
9

Introduction to Your Projector

Refer to these sections to learn more about your projector and this manual.
Projector Features Notations Used in the Documentation Where to Go for Additional Information Additional Projector Software and Manuals Projector Part Locations

Projector Features

The PowerLite Home Cinema 3900 projector includes these special features:
Bright, high-resolution projection system
• Up to 2700 lumens of color brightness (color light output) and 2700 lumens of white brightness (white light output)
Note: Color brightness (color light output) and white brightness (white light output) will vary depending on usage conditions. Color light output measured in accordance with IDMS 15.4; white light output measured in accordance with ISO 21118.
• 1080p native resolution
• Images up to 300 inches (7.62 m) for projection on any wall or screen
Full 3D projection
• Active 3D projection with optional RF active shutter glasses
• Supports side-by-side, top-and-bottom, and frame-packing 3D formats
Flexible connectivity
• Two HDMI ports for video device or computer connections
• Support for an optical HDMI connection
• One MHL-compatible HDMI port
Easy-to-use setup and operation features
• Vertical and horizontal lens shift, and vertical keystone correction buttons for flexible projector placement
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• 1.6× optical zoom ratio for improved zooming capability
Product Box Contents Additional Components Optional Equipment and Replacement Parts Warranty and Registration Information
Parent topic: Introduction to Your Projector

Product Box Contents

Save all the packaging in case you need to ship the projector. Always use the original packaging (or equivalent) when shipping.
Make sure your projector box included all of these parts:
1 Projector
2 Remote control
3 Remote control batteries (two AA alkaline)
4 Power cord
5 Projector documentation CD
Parent topic: Projector Features
11

Additional Components

Depending on how you plan to use the projector, you may need to obtain additional components.
Note: To connect a Mac that does not include a compatible video output port, you need to obtain an adapter that allows you to connect to an input port on the projector. Contact Apple for compatible adapter options. To connect a smartphone or tablet, you may need to obtain an adapter that allows you to connect to the projector. This allows you to mirror your smartphone or tablet screens, watch movies, and more. Contact your device manufacturer for compatible adapter options.
Unless listed as available from Epson in this table, see your local computer or electronics dealer for purchase information.
Signal or connection type
HDMI Compatible HDMI cable
Optical HDMI Compatible optical HDMI cable
MHL MHL-compatible device or device with an integrated MHL connector, MHL
3D Compatible HDMI cable and active shutter 3D glasses
External audio Speakers, an audio video receiver, or a video source with speaker
VGA To connect a computer through its VGA port to the projector's VGA video
Additional component necessary
Available for purchase from Epson or an authorized Epson reseller.
cable, or HDMI cable and MHL adapter compatible with your device
Available for purchase from Epson or an authorized Epson reseller.
Available for purchase from Epson or an authorized Epson reseller.
Note: If your video source is a 3D Blu-ray disc, you also need a Blu-ray player that supports 3D playback. See your local computer or electronics dealer for purchase information.
connections, and the cables necessary for connecting them
port, you need a VGA computer cable.
Available for purchase from Epson or an authorized Epson reseller.
Parent topic: Projector Features
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Related references

Optional Equipment and Replacement Parts

Optional Equipment and Replacement Parts
You can purchase screens, other optional accessories, and replacement parts from an Epson authorized reseller. To find the nearest reseller, call 800-GO-EPSON (800-463-7766). Or you can purchase online at epsonstore.com (U.S. sales) or epson.ca (Canadian sales).
Epson offers the following optional accessories and replacement parts for your projector:
Option or part Part number
Genuine Epson replacement lamp (ELPLP85) V13H010L85
Replacement air filter (ELPAF39) V13H134A39
RF 3D glasses (ELPGS03) V12H548006
Projector ceiling mount (ELPMB20/22/30) CHF1000
Belkin PureAV HDMI audio video cable, 6 ft AV22300-06
Belkin PureAV HDMI audio video cable, 12 ft AV22300-12
Belkin PureAV HDMI audio video cable, 3 ft AV22300-03
Belkin Pro Series VGA/SVGA cable, 6 ft F3H982-06
Belkin Pro Series VGA/SVGA cable, 10 ft F3H982-10
Belkin Pro Series VGA/SVGA cable, 25 ft F3H982-25
Remote control 2175313
Wireless LAN module (ELPAP10) V12H731P02
3D Glasses Charger ELPAC01
In addition to the accessories listed above, 1-year and 2-year extended service plans are available.
Parent topic: Projector Features

Warranty and Registration Information

Your projector comes with a basic warranty that lets you project with confidence. For details, see the warranty brochure that came with your projector.
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In addition, Epson offers free Extra Care Home Service. In the unlikely event of an equipment failure, you won’t have to wait for your unit to be repaired. Instead, Epson will ship you a replacement unit anywhere in the United States, Canada, or Puerto Rico. See the Extra Care Home Service brochure for details.
Register your product online using the projector CD or at this site: epson.com/webreg
Registering also lets you receive special updates on new accessories, products, and services.
Parent topic: Projector Features

Notations Used in the Documentation

Follow the guidelines in these notations as you read your documentation:
• Warnings must be followed carefully to avoid bodily injury.
• Cautions must be observed to avoid damage to your equipment.
• Notes contain important information about your projector.
• Tips contain additional projection information.
Parent topic: Introduction to Your Projector

Where to Go for Additional Information

Need quick help on using your projector? Here's where to look for help:
• epson.com/support (U.S) or epson.ca/support (Canada)
View FAQs (frequently asked questions) and e-mail your questions to Epson technical support 24 hours a day.
• If you still need help after checking this manual and any other sources listed here, you can use the Epson PrivateLine Support service to get help fast. For details, see "Where to Get Help".
Parent topic: Introduction to Your Projector
Related references
Where to Get Help

Additional Projector Software and Manuals

After connecting and setting up the projector, install the projector software from the included software CD, or download the software and manuals as necessary.
You can install the projector software programs listed here and view their manuals for instructions on using them.
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Note: If you still need help after checking this manual and the sources listed here, you can use the
Epson PrivateLine Support service to get help fast. For details, see "Where to Get Help".
Projector software Manual Description
EasyMP Multi PC Projection
Epson iProjection app Instructions are included
Parent topic: Introduction to Your Projector
Related references
Where to Get Help

Projector Part Locations

Check the projector part illustrations to learn about the parts on your projector.
Projector Parts - Front/Top Projector Parts - Rear Projector Parts - Base Projector Parts - Control Panel Projector Parts - Remote Control
EasyMP Multi PC Projection Operation Guide
with the app
Lets you hold interactive meetings by projecting the computer screens of users over a network.
Lets you project from an iOS or Android device if your projector is connected to a network that includes a wireless access point.
Visit epson.com/projectorapp (U.S.) or
epson.ca/projectorapp (Canada) for more
information.
Parent topic: Introduction to Your Projector
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Projector Parts - Front/Top

1 Lamp cover
2 Exhaust vent
3 Focus ring
4 Lens cap
5 Lens
6 Zoom ring
7 Remote receiver
8 Front adjustable feet
9 Air intake/air filter cover
10 Vertical lens shift dial
11 Horizontal lens shift dial
12 Control panel and lights
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Parent topic: Projector Part Locations

Projector Parts - Rear

1 AC input port
2 Trigger Out port
3 RS-232C port
4 Security cable attachment point
5 Cable holder
6 1000 mA port (USB power for optical HDMI connections)
7 Remote receiver
8 USB port
9 Service port
10 HDMI2/MHL port
11 PC port (VGA)
12 HDMI1 port
13 LAN port
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Parent topic: Projector Part Locations
Related tasks
Installing a Security Cable

Projector Parts - Base

1 Front adjustable feet
2 Mounting bracket holes
3 Intake vent
Parent topic: Projector Part Locations
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Projector Parts - Control Panel

1 Lamp light
2 Status light
3 Power button and light
4 Home button
5 Horizontal keystone adjustment buttons (adjust screen shape) and arrow buttons
6 Vertical keystone adjustment buttons (adjust screen shape) and arrow buttons
7 Brightness sensor
8 Esc button (cancels/exits functions)
9 Enter button (selects options)
10 Menu button (accesses projector menu system)
11 Temp light
Parent topic: Projector Part Locations
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Projector Parts - Remote Control

1 On button (turns on projector)
2 Source buttons (select specific video input sources)
3 Control buttons (control playback and other features of connected devices that support the HDMI
CEC or MHL standard)
Link Menu button (displays the main menu of the connected device)
4 HDMI Link button (displays the settings menu for HDMI Link)
5 3D Format button (changes the 3D format)
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6 Arrow buttons (move though on-screen options)
7 Default button (returns selected setting to default value)
8 Menu button (accesses projector menu system)
9 Fine/Fast button (improves image response time for high frame rate sources)
10 User button (customizable for different functions)
11 Memory button (accesses the Memory menu)
12 Frame Int button (adjusts the Frame Interpolation setting)
13 Pattern button (displays a test pattern)
14 A/V Mute button (turns off picture and sound)
15 2D/3D button (cycles between 2D and 3D modes)
16 Aspect button (selects the image aspect ratio)
17 RGBCMY button (adjusts hue, saturation, and brightness for each RGBCMY color)
18 Esc button (cancels/exits functions)
19 Enter button (selects options)
20 Image Enh button (displays the Image Enhancement menu)
21 Color Mode button (selects display modes)
22 Volume up/down buttons (adjust externally connected speaker volume)
23 Mute button (turns off sound only)
24 P-in-P button (controls the Picture-in-Picture mode)
25 Home button (displays the Home screen)
26 Illumination button (temporarily lights the remote control buttons)
27 Standby button (turns off the projector)
Parent topic: Projector Part Locations
Related references
Remote Control Specifications
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Setting Up the Projector

Follow the instructions in these sections to set up your projector for use.
Projector Placement Projector Connections Installing Batteries in the Remote Control

Projector Placement

You can place the projector on almost any flat surface to project an image.
You can also install the projector in a ceiling mount if you want to use it in a fixed location.
Keep these considerations in mind as you select a projector location:
• Place the projector on a sturdy, level surface or install it using a compatible mount.
• Leave plenty of space around and under the projector for ventilation, and do not place it on top of or next to anything that could block the vents.
• Position the projector within reach of a grounded electrical outlet or extension cord.
Projector Setup and Installation Options Projection Distance
Parent topic: Setting Up the Projector
Related tasks
Changing the Projection Mode Using the Menus

Projector Setup and Installation Options

You can set up or install your projector in the following ways:
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Front
Rear
Front Ceiling
23
Rear Ceiling
Wherever you set up the projector, make sure to position it squarely in front of the center of the screen, not at an angle, if possible. If the projector cannot be centered in front of the screen, use lens shift to reposition the image instead of using keystone correction for better image quality.
If you project from the ceiling or from the rear, be sure to select the correct Projection option in the projector's menu system.
Parent topic: Projector Placement
Related references
Projector Setup Settings - Extended Menu

Projection Distance

The distance at which you place the projector from the screen determines the approximate size of the image. The image size increases the farther the projector is from the screen, but can vary depending on the zoom factor, aspect ratio, and other settings.
Use the tables here to determine approximately how far to place the projector from the screen based on the size of the projected image. (Conversion figures may have been rounded up or down.)
You can also use the projector Throw Distance Calculator at epson.com/support (U.S.) or
epson.ca/support (Canada).
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Vertical lens shift adjustment
Horizontal lens shift adjustment
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1 Screen or image size
2 Distance between projector and screen
3 Distance from center of lens to bottom of the projected image when the lens is shifted to the
highest position
4 Distance from center of lens to bottom of the projected image when the lens is shifted to the
lowest position
5 Distance the projected image moves from the center when the lens is shifted to its maximum
position left or right
16:9 Aspect Ratio Image or Screen
Screen or image size (1) Projection distance (2)
Wide to Tele
40 inches (101.6 cm) 46 to 75 inches
(116 to 190 cm)
60 inches (152.4 cm) 69 to 113 inches
(176 to 286 cm)
80 inches (203.2 cm) 93 to 150 inches
(235 to 382 cm)
100 inches (254 cm) 116 to 188 inches
(295 to 478 cm)
120 inches (304.8 cm) 139 to 226 inches
(354 to 575 cm)
150 inches (381 cm) 174 to 283 inches
(443 to 719 cm)
180 inches (457 cm) 209 to 340 inches
(532 to 863 cm)
26
Screen or image size (1)
Offset from lens center (3)
Offset from lens center (4)
Offset from lens center (5)
40 inches (101.6 cm) 2 inches (5 cm) 21.6 inches (55 cm) 8.4 inches (21 cm)
60 inches (152.4 cm) 2.9 inches (7 cm) 32.4 inches (82 cm) 12.6 inches (32 cm)
80 inches (203.2 cm) 3.9 inches (10 cm) 43.1 inches (110 cm) 16.7 inches (43 cm)
100 inches (254 cm) 4.9 inches (12 cm) 53.9 inches (137 cm) 20.9 inches (53 cm)
120 inches (304.8 cm) 5.9 inches (15 cm) 64.7 inches (164 cm) 25.1 inches (64 cm)
150 inches (381 cm) 7.4 inches (19 cm) 80.9 inches (205 cm) 31.4 inches (80 cm)
180 inches (457 cm) 8.7 inches (22 cm) 97.2 inches (247 cm) 37.7 inches (96 cm)
4:3 Aspect Ratio Image or Screen
Screen or image size (1) Projection distance (2)
Wide to Tele
40 inches (101.6 cm) 56 to 92 inches
(143 to 233 cm)
60 inches (152.4 cm) 85 to 138 inches
(216 to 351 cm)
80 inches (203.2 cm) 114 to 184 inches
(288 to 468 cm)
100 inches (254 cm) 142 to 231 inches
(361 to 586 cm)
120 inches (304.8 cm) 171 to 277 inches
(434 to 704 cm)
150 inches (381 cm) 214 to 347 inches
(543 to 880 cm)
200 inches (508 cm) 285 to 463 inches
(724 to 1175 cm)
27
Screen or image size Offset from lens
40 inches (101.6 cm) 2.4 inches (6 cm) 26.4 inches (67 cm) 10.2 inches (26 cm)
60 inches (152.4 cm) 3.6 inches (9 cm) 39.6 inches (101 cm) 15.4 inches (39 cm)
80 inches (203.2 cm) 4.8 inches (12 cm) 52.8 inches (134 cm) 20.5 inches (52 cm)
100 inches (254 cm) 6 inches (15 cm) 66 inches (168 cm) 25.6 inches (65 cm)
120 inches (304.8 cm) 7.2 inches (18 cm) 79.2 inches (201 cm) 30.7 inches (78 cm)
150 inches (381 cm) 9 inches (23 cm) 99 inches (251 cm) 38.4 inches (98 cm)
200 inches (508 cm) 12 inches (30 cm) 132 inches (335 cm) 51.2 inches (130 cm)
Parent topic: Projector Placement

Projector Connections

See these sections to connect the projector to a variety of projection sources.
Caution: If you will use the projector at altitudes above 4921 feet (1500 m), turn on High Altitude Mode to ensure the projector's internal temperature is regulated properly.
Connecting to an HDMI Video Source Connecting to Computer Sources Connecting to External Speakers Connecting to a Trigger Out Port
center (2)
Offset from lens center (3)
Offset from lens center (4)
Parent topic: Setting Up the Projector
Related references
Projector Setup Settings - Extended Menu

Connecting to an HDMI Video Source

If your video source has an HDMI port, you can connect it to the projector using an optional HDMI cable. The HDMI connection provides the best image quality.
1. Connect the HDMI cable to your video source's HDMI output port.
28
2. Connect the other end to one of the projector's HDMI ports. If you are connecting an optical HDMI
cable, you must also connect the cable's USB power connector to the 1000mA port.
You can also select the Fast setting using the Fine/Fast button on the remote control to reduce lag time.
Note: When an audio/video source that meets the HDMI CEC standard is connected to the projector's HDMI port, you can use the projector's remote control to control certain features of the linked device by pressing the HDMI Link button on the remote control and setting HDMI Link to On.
Parent topic: Projector Connections
Related references
Projector Feature Settings - Settings Menu

Connecting to Computer Sources

Follow the instructions in these sections to connect a computer to the projector.
Connecting to a Computer for VGA Video Connecting to a Computer for HDMI Video
Parent topic: Projector Connections
Connecting to a Computer for VGA Video
You can connect the projector to your computer using a VGA computer cable.
Note: To connect a Mac that includes only a Mini DisplayPort, Thunderbolt port, or Mini-DVI port for video output, you need to obtain an adapter that allows you to connect to the projector's VGA video port. Contact Apple for compatible adapter options.
1. If necessary, disconnect your computer's monitor cable.
2. Connect the VGA computer cable to your computer's monitor port.
29
3. Connect the other end to a PC port on the projector.
4. Tighten the screws on the VGA connector.
Parent topic: Connecting to Computer Sources
Connecting to a Computer for HDMI Video
If your computer has an HDMI port, you can connect it to the projector using an optional HDMI cable.
Note: To connect a Mac that includes only a Mini DisplayPort, Thunderbolt port, or Mini-DVI port for video output, you need to obtain an adapter that allows you to connect to the projector's HDMI port. Contact Apple for compatible adapter options.
1. Connect the HDMI cable to your computer's HDMI output port.
2. Connect the other end to one of the projector's HDMI ports. If you are connecting an optical HDMI
cable, you must also connect the cable's USB power connector to the 1000mA port.
Note: The projector converts the digital audio signal sent from your computer into a mono analog signal for the internal speaker.
Parent topic: Connecting to Computer Sources
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